Characterizations of fibers produced from polypropylene/silica composite
Keywords:Polypropylene/Silica composite fibers, β-form nucleating, Sonic modulus
AbstractFumed silica particles filled polypropylene (PP) filament fibers were prepared by melt spin pilot plant. First, virgin PP and silicas(hydrophilic and hydrophobic) were premixed using twin screw extruder to prepare silica containing PP composite resin. Then, the resin composite was again mixed with virgin PP and spun into filaments with various filler loadings in the range of 0.5 - 2.5 wt%. The characterizations of spun composite fibers including crystallization temperature (DSC analysis), polymer orientation (sonic modulus) and the fine structure (XRD) were studied. XRD results showed Î²-form crystallinity peak in x-ray pattern of fiber drawn with low take-up speed (300 m/min), indicating that infused nano silica was capable of acting as Î²-form nucleating agent. The crystallization temperatures (Tc) of composite fibers were found to be higher than that of neat fiber, further confirming the nucleating effect of silica filler. However, the presence of silica dispersion resulted in the interference of polymer molecule orientation along a fiber axis as judged by sonic modulus measurement. As a result of hydrophobic silica loading, composite PP fibers exhibited the extent of thermal stability due to the fact that, in addition to a fraction of the heat absorbed by silica particles, extra heat was required to overcome interfacial adhesion force.
Velasco, J.I., De Saja, J.A. and Martinez, A.B. 1996. Crystallization behavior of polypropylene filled with surface-modified talc. J. Appl. Polym. Sci. 61 : 125-132.
Qiu, W.L., Mai, K.C. and Zeng, H.M. 2000. Effect of silane-grafted polypropylene on the mechanical properties and crystallization behavior of talc/polypropylene composites. J. Appl. Polym. Sci. 77: 2974-2977.
Amash, A. and Zugenmaier, P. 2000. Crystallization and orientation studies in polypropylene/single wall carbon nanotube composite. Polymer. 41 : 1589-1596.
Esfandiari, A. 2008. The statistical investigation of mechanical properties of PP/Natural fibers composites Fiber. Polym. 9 : 48-54.
Sui, G., Fuqua , M.A., Ulven, C.A. and Zhong, W.H. 2009. A plant fiber reinforced polymer composite prepared by a twin-screw extruder. Bioresource Technology. 100 : 1246-1251.
Bhattacharyya, A.R., Sreekumar, T.V., Liu, T., Kumar, S., Ericson, L.M., Robert, H.H. and Smalley, R.E. 2003. Crystallization and orientation studies in polypropylene/sngle wall carbon nanotube composite. Polymer. 44 : 2373-2377.
Chatterjee, A. and Deopura, B.L. 2003. Crystallization behaviour of PP and carbon nanofibre blends. Fiber. Polym. 4 : 102-106.
Liu, X.H. and Wu, Q.J. 2001. PP/clay nanocomposites prepared by grafting-melt intercalation. Polymer. 42 : 10013-10019.
Gao, F. 2004. Mater. Today. 7(50,110) : 50-55.
Rottstegge, J., Zhang, X., Zhou, Y., Xu, D., Han, C.C. and Wang, D. 2007. Polymer nanocomposite powders and melt spun fibers filled with silica nanoparticles. J. Appl. Polym. Sci. 103 : 218-227.
Caldas, V., Brown, G.R., Nohr, R.S., Macdonald, J.G. and Raboin, L.E. 1997. Enhancement of tensile properties of isotactic polypropylene spunbonded fabrics by a surface-modified silica/ silicone copolymer additive. J. Appl. Polym. Sci. 65 : 1759-1772.
Tian, X.Y., Zhang, X., Liu, W.T., Zheng, J., Ruan, C.J. and Cui, P. 2006. Preparation and properties of poly(ethylene terephthalate) /silica nanocomposites. J. Macromol. Sci. Phys. 45 : 507-513.
Zheng, H. and Wu, J.L. 2007. Preparation, crystallization, and spinnability of poly(ethylene terephthalate)/silica nanocomposites. J. Appl. Polym. Sci. 103 : 2564-2568.
He, J.P., Li, H.M., Wang, X.Y. and Gao, Y. 2006. In situ preparation of poly(ethylene terephthalate)-SiO2 nanocomposites. Eur. Polym. J.42: 1128-1134.
Liu, W.T., Tian, X.Y., Cui, P., Li, Y., Zheng, K. and Yang, Y. 2004. Preparation and characterization of PET/Silica nanocomposites. J. Appl. Polym. Sci. 91: 1229-1232.
Yang Y.Z. and Gu, H.C. 2007. Preparation and properties of deep dye fibers from poly (ethylene terephthalate)/SiO2 nanocomposites by in situ polymerization. J. Appl. Polym. Sci. 105 : 2363-2369.
Mahfuz, H., Hasan, M.M., Rangari, V.K. and Jeelani, S. 2007. Reinforcement of nylon-6 filaments with SiO2 nanoparticles and comparison of Young’s modulus with theoretical bounds. Macromolecular Materials and Engineering, 292 : 437-444.
Broda, J., Gawlowski, A., Slusarczyk, C., Wlochowicz, A. and Fabia, J. 2007. The influence of additives on the structure of polypropylene fibres. Dyes and Pigments. 74 : 508-511.
Yang, F. and Nelson, G.L. 2006. Polymer/silica nanocomposites prepared via extrusion. Polym. Adv. Technol. 17 : 320-326.
Bikiaris, D.N., Papageorgiou, G.Z., Pavlidou, E., Vouroutzis, N., Palatzoglou, P. and Karayannidis, G.P. 2006. Preparation bv melt mixing and characterization of isotactic polypropylene/ SiO2 nanocomposites containing untreated and surface-treated nanoparticles.J. Appl. Polym. Sci.100: 2684-2696.
Garcia, M., van Vliet, G., Jain, S., Schrauwen, B., Sarkissov, A., Van Zyl, W.E. and Boukamp, B. 2004. Polypropylene/SiO2 nanocomposites with improved mechanical properties. Rev. Adv. Mater. Sci. 6 : 169-175.
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